The Crystal Tower

When The Crystal Tower enters the
battlefield, choose a color.
{t}: Add one mana of the chosen color to your
mana pool. If you control The Crystarium, add another.
{1}{t}: Target Scion gains protection from the
chosen color until the end of turn.
It now stands revealed in all its splendor, a gleaming
spear of crystal, pointed at the bosom of the heavens.